Quiz about Chemical Reactions Review

Question 1

Anything that has mass and takes up space is

Accepted Answer

matter

Answer

space itself

Answer

property

Answer

a chemical reaction

Question 2

Matter cannot be created nor destroyed, it can only

Accepted Answer

change form

Answer

disappear

Answer

evaporate

Answer

change into energy

Question 3

________________ is an example of a chemical property

Accepted Answer

radioactivity

Answer

boiling point

Answer

conductivity

Answer

color

Question 4

Examples of chemical changes are (select all that apply)

Accepted Answer

baking a cake

Accepted Answer

a bike chain rusting

Accepted Answer

wood burning

Answer

boiling water

Answer

crumbling up a piece of paper

Question 5

Examples of physical changes are (select all that apply)

Accepted Answer

boiling water

Accepted Answer

crumbling up a piece of paper

Accepted Answer

a glass breaking

Answer

baking a cake

Answer

a bike chain rusting

Question 6

In a chemical reaction, what is the relationship between the total mass of the reactants and the total mass of the products?

Accepted Answer

They must be equal

Answer

The mass of the product must be greater

Answer

The mass of the reactant must be greater

Answer

There is no general relationship between the two

Question 7

The starting materials in a chemical reaction are called

Accepted Answer

reactants

Answer

products

Answer

percipitates

Answer

isotopes

Question 8

The new substances formed in a chemical reaction are called.

Accepted Answer

products

Answer

percipitates

Answer

isotopes

Answer

reactants

Question 9

If 4 atoms of hydrogen react with 2 atoms of oxygen, how many atoms will be in the product?

Accepted Answer

6

Answer

2

Answer

4

Answer

8

Question 10

Given this chemical equation below, what is the total number of atoms in the reactants?

Accepted Answer

8

Answer

12

Answer

16

Answer

24

Question 11

Given this chemical equation below, what is the total number of atoms in the products?

Accepted Answer

8

Answer

24

Answer

12

Answer

16

Question 12

How many Carbons are in the reactant?

Accepted Answer

3

Answer

6

Answer

8

Answer

10

Question 13

How many Oxygens are in the products?

Accepted Answer

10

Answer

3

Answer

6

Answer

8

Question 14

1. The diagram above shows the repeating groups of atoms that make up two samples. Will the properties of the two samples be the same or different?(Examples of properties are smell, color, and the temperature at which a substance melts.)

Accepted Answer

A. The properties will be different because the repeating groups of atoms that make up each sample are different.

Answer

B. The properties will be different because there are more repeating groups of atoms in Sample 2.

Answer

C. The properties will be the same because the repeating groups of atoms that make up the two samples have the same number of atoms.

Answer

D. The properties will be the same because the repeating groups of atoms that make up the two samples have two of the same types of atoms.

Question 15

2. Serena mixed two samples together: a gray solid that smells like flowers and a gray solid that smells like bleach. She analyzed the results and found two products. The following diagram shows the reactions' products. Which of the following diagrams shows the repeating groups of atoms that make up the reactants Serena mixed together?

Accepted Answer

Option D is correct

Answer

A.

Answer

B.

Answer

C.

Question 16

3. Tiana is a chemist who is making a chemical to add to swimming pools in order to make the water safer. She mixed two solid substances together in a sealed container. The following diagram above shows the repeating groups of atoms that make up the two reactants. After mixing, Tiana found two liquid substances in the sealed container. (Nothing had escaped.) Which of the diagrams below shows the repeating groups of atoms that make up the products.

Accepted Answer

Option C is correct

Answer

A.

Answer

B.

Answer

D.

Question 17

4. The following diagram shows the repeating groups of atoms that make up two samples. Will the properties of the two samples be the same or different? (Examples of properties are smell, color, and the temperature at which a substance melts.)

Accepted Answer

A. The properties will be different because the repeating groups of atoms that make up each sample are different.

Answer

B. The properties will be different because there are more repeating groups of atoms in Sample 1.

Answer

C. The properties will be the same because the repeating groups of atoms that make up the two samples have one of the same types of atoms.

Answer

D. The properties will be the same because the repeating groups of atoms that make up the two samples have the same number of atoms.

Question 18

5. Damian mixed two samples together: a red liquid that smells irritating and a black solid with no smell. He analyzed the results and found two products.  The following diagrams show the products of this reaction. Which of the following diagrams shows the repeating groups of atoms that make up reactants in Damian's chemical reaction?

Accepted Answer

Option B is correct

Answer

A.

Answer

C.

Answer

D.

Question 19

6. Santiago is a chemist working to make a new kind of  medicine that helps with stomach pain. He mixed two powdery solid substances together in a sealed container. The following diagram shows the repeating groups of atoms that make up the two reactants. Which of the diagrams below shows the repeating groups of atoms that make up the products.

Accepted Answer

Option D is correct

Answer

A.

Answer

B.

Answer

C.

Question 20

7. The diagram above shows the repeating groups of atoms that make up two samples. Both samples are liquid at room temperature. Will the properties of the two samples be the same or different? (Examples of properties are smell, color, and the temperature at which a substance melts.)

Accepted Answer

C. The properties will be different because the repeating groups of atoms that make up the two samples have different numbers of atoms.

Answer

A. The properties will be the same because the repeating groups of atoms that make up the two samples have the same types of atoms.

Answer

B. The properties will be the same because both samples are liquids at room temperature.

Answer

D. The properties will be different because there are more repeating groups of atoms in Sample 1.

Question 21

8. Marisol mixed two samples together: a brown liquid with no smell and a colorless gas that smells irritating. She analyzed the results and found two products. The following diagrams show the products of this reaction. Which of the following diagrams shows the repeating groups of atoms that make up reactants Marisol mixed together?

Accepted Answer

Option A is correct

Answer

B.

Answer

C.

Answer

D.

Question 22

9. Jamie works at a company that makes cleaning chemicals. She is trying to make a chemical that smells like flowers. She took two samples that were gases at room temperature and mixed them in a sealed container. The following diagram shows the repeating groups of atoms that make up the reactants. After mixing, Jamie found two substances that smelled like flowers in the sealed container. (Nothing had escaped.) Which of the diagrams below shows the repeating groups of atoms that make up the products?

Accepted Answer

Option D is correct

Answer

A.

Answer

B.

Answer

C.

Question 23

10. The diagram above shows the repeating groups of atoms that make up two samples. Both samples are green gases at room temperature. Will the other properties of the two samples be the same or different? (Examples of properties are smell, color, and the temperature at which a substance melts.)

Accepted Answer

A. The other properties will be the same because the repeating groups of atoms that make up the two samples are the same.

Answer

B. The other properties will be different because there are more repeating groups of atoms in Sample 2.

Answer

C. The other properties will be the same because both samples are green at room temperature.

Answer

D. The other properties will be the same because both samples are gases at room temperature.

Question 24

12. Patrik works at a company that makes paper and needs a chemical to make the paper brighter. He mixed two colorless substances together in a sealed container. The diagram below shows the repeating groups of atoms that make up the two reactants. After mixing, Patrik found two white substances in the sealed container. Which of the diagrams below shows the repeating groups of atoms that make up the products.

Accepted Answer

Option B is correct

Answer

A.

Answer

C.

Answer

D.

Question 25

Which of the following best describes a physical change rather than a chemical change?

Accepted Answer

Melting ice

Answer

Baking a cake

Answer

Burning wood

Answer

Rusting iron

Question 26

What is conserved in every chemical reaction?

Accepted Answer

Total mass

Answer

Color

Answer

Volume

Answer

Number of molecules

Question 27

Which statement is true about the products and reactants in a balanced chemical equation?

Accepted Answer

The number of atoms of each element is the same on both sides.

Answer

The reactants always have more energy than the products.

Answer

There are always more products than reactants.

Answer

The products always have more mass than the reactants.

Question 28

Ability to rust is this type of property:

Accepted Answer

Chemical property

Answer

Physical property

Question 29

Marisol mixed two samples together: a brown liquid with no smell and a colorless gas that smells irritating. She analyzed the results and found two ending substances. One of the ending substances smelled sweet. This ending substance is made up of the repeating group of atoms shown above. Which of the diagrams to the left shows the repeating groups of atoms that make up the samples Marisol mixed together?

Remember - A CHEMICAL REACTION occurred, so there needs to be rearrangement of reactants

Accepted Answer

Option D is correct

Answer

A.

Answer

B.

Answer

C.

Question 30

Damian mixed two samples together: a red liquid that smells irritating and a black solid with no smell. He analyzed the results and found two ending substances. One of the ending substances was a yellow solid. This ending substance is made up of the repeating group of atoms shown above. Which of the diagrams to the left shows the repeating groups of atoms that make up the samples Damian mixed together?

Accepted Answer

Option B is correct

Answer

A.

Answer

C.

Answer

D.

Question 31

Which property is an example of a chemical property?

Accepted Answer

The ability to burn

Answer

The ability to dissolve

Answer

The ability to evaporate

Answer

The ability to melt

Question 32

Marisol mixed two samples together: a brown liquid with no smell and a colorless gas that smells irritating. She analyzed the results and found two ending substances. One of the ending substances smelled sweet. This ending substance is made up of the repeating group of atoms shown above. Which of the diagrams to the left shows the repeating groups of atoms that make up the samples Marisol mixed together?

Accepted Answer

Option D is correct

Answer

A.

Answer

B.

Answer

C.

Question 33

Which of the models of a chemical reaction best represents the Law of Conservation of Mass?

Accepted Answer

A

Answer

B

Answer

C

Answer

D

Question 34

If you start a chemical reaction with 5 atoms of helium, how many atoms will you have after?

Accepted Answer

5 atoms

Answer

4 atoms

Answer

10 atoms

Answer

1 atom

Question 35

Which of the models of a chemical reaction best represents the Law of Conservation of Mass?

Accepted Answer

A

Answer

B

Answer

C

Answer

D

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